this post was submitted on 01 Aug 2023
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First U.S. nuclear reactor built from scratch in decades enters commercial operation in Georgia::ATLANTA — A new reactor at a nuclear power plant in Georgia has entered commercial operation, becoming the first new American reactor built from scratch in decades.

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[–] rm_dash_r_star@lemm.ee 29 points 1 year ago* (last edited 1 year ago) (3 children)

Fusion and fission are quite different. A practical fusion reactor does not exist. It's outside our technological capability right now. Current fusion reactors are only experimental and can not maintain a reaction more than a small fraction of a second. The problem is plasma containment. If that can be solved, it would be possible to build a practical fusion reactor.

The fuel for a working fusion reactor would likely be deuterium/tritium which is in effect unlimited since it can be extracted from seawater. Also the amount of fuel required is small because of the enormous amounts of energy produced in converting mass to energy. Fusion converts about 1% of mass to energy. Output would be that converted mass times the speed of light squared which is a very, very large number, in the neighborhood of consumed fuel mass times 10^15^.

Fusion is far less toxic to to the environment. With deuterium/tritium fusion the waste product is helium. All of the particle radiation comes from neutrons which only require shielding. Once the kinetic energy of the particles is absorbed, it's gone. There's no fissile waste that lingers for some half life.

[–] killa44@lemmy.world 1 points 1 year ago (1 children)

I was just future proofing my comment for things like this: https://youtu.be/_bDXXWQxK38

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[–] PersnickityPenguin@lemm.ee 1 points 1 year ago

Your info is a little out of date - some fusion experiments have been able to maintain fusion for almost a minute. However, your point still stands. We are decades away at a minimum untill a viable fusion reactor.

My guess is that fusion will be too expensive for commercial use unless they can get a super compact stellarator design to produce huge amounts of energy, and make them cheap to build (HA!).

Or we will see them in spaceships. :P